It has been hardly a week since Google pushed Android 4.1.1 Jelly Bean source code to AOSP. While most of the devices have already got a preview build of CM10, based on Jelly Bean, it lacks all the ‘CM’ features like Notification toggles, lock screen shortcuts, music controls etc. Due to the framework changes in Jelly Bean, the CM/AOKP team and other ROM developers will have to merge all their patches manually to make sure there are no conflicts.
AOKP (Android Open Kang Project) is one of the most popular ROMs for Galaxy Nexus owners, and is used by the majority of them over CM9, due to the features the former packs. While there are already a few preview builds of CM10 available for the Galaxy Nexus, the AOKP team did not release a preview AOKP build based on Jelly Bean until today.
Roman, the founder and lead developer of the AOKP team, has released the first preview build of AOKP ROM, based on Android 4.1.1 Jelly Bean, for the Galaxy Nexus (GSM and Verizon variants). Since this is the first AOKP build on Jelly Bean, it lacks all the AOKP features like Navigation bar customization, lock screen weather and calendar widgets, 2G/3G toggle and more.
The preview build only contains some basic features like notification bar toggles, a new logo, battery % in status bar, and a few other minor features. While not feature rich, it should definitely be enough until AOKP b41 arrives with more features.